Just bought the above wireless thermostat and a separate programmer to control my combi. Both are 7-day ones. The reason for this setup is that we do know exactly where we want to programmer/controller to be positioned (for convenience reasons), but am not sure exactly where to position the thermostat. The house is quite drafty, so we may have to try a few places before we find the best one.

I run 2 x 2.5mm Twin & Earth cables from the boiler to the position where the programmer is to be located (I can get mains feed either from the boiler end, and also from near where the programmer is going to be located). I also intend to fix the CMT927 receiver unit very close to the programmer (~1m).

Does that make sense as a set up?